E3S Web Conf.
Volume 85, 2019EENVIRO 2018 – Sustainable Solutions for Energy and Environment
|Number of page(s)||7|
|Section||Computational Fluid Dynamics in Built Environment|
|Published online||22 February 2019|
Mesh independency study for an elementary perforated panel part of an air solar collector
Technical University of Civil Engineering Bucharest, Faculty of Engineering for Building Services, 021414 Bucharest, Romania
2 CAMBI Research Center, 021407 Bucharest, Romania
3 Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania
* Corresponding author: email@example.com
In order to achieve the numerical model of a transpired solar collector (TSC) with integrated phase changing materials (PCM) it is mandatory to study the impact of the orifice geometry on the entire system. The numerical simulation of the entire solar collector absorber metal plate (1000x2000mm and 5000 orifices) is not feasible thus resulting a huge number of cells for the numerical grid for which we will need very high computational resources and a very large amount of time to be solved. By taking these aspects into account we decided to simulate only four equivalent orifices and then to transpose the results to the actual case for further studies. The present paper aims to analyse the mesh independency study for an elementary perforated panel with four equivalent lobed orifices which is part of a real case TSC. This analysis represents one of the most important stages within the construction of the TSC numerical model and doesn't need an experimental validation. The study was conducted in Ansys Fluent CFD software and the results were processed directly by using Tecplot software. Six different meshes were analysed (from 0.2 to 7.3 million cells), boundary conditions were imposed, and k-ε RNG turbulence model was used according to the literature. After comparing velocity and temperature fields in longitudinal and transverse planes we concluded that from 5.3 million cells the solution is independent of the meshing quality.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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